Not sure about that wallet has owned by someone else, but a lot of problem with that address. A lot of people are complaining about they are sending their ethereum from exchange a to the exchange b. But their fund automatically directed to the 0xc257274276a4e539741ca11b590b9447b26a8051.
Some people are searching about what's wrong with it. but till not they are not even know about what already happened with their amount.
If we suspect it as the hacker's address and i'm not sure about that.